<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="班级名称" prop="className">
        <el-input
          v-model="queryParams.className"
          placeholder="请输入班级名称"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="专业" prop="majorId">
        <el-select 
          v-model="queryParams.majorId" 
          placeholder="请选择专业" 
          clearable 
          filterable
          style="width: 200px"
        >
          <el-option
            v-for="major in majors"
            :key="major.majorId"
            :label="major.majorName + ' (ID: ' + major.majorId + ')'"
            :value="major.majorId"
          />
        </el-select>
      </el-form-item>
      <el-form-item label="导员姓名" prop="instructorName">
        <el-input
          v-model="queryParams.instructorName"
          placeholder="请输入导员姓名"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="班主任姓名" prop="headTeacherName">
        <el-input
          v-model="queryParams.headTeacherName"
          placeholder="请输入班主任姓名"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="学生数量" prop="studentScale">
        <el-input
          v-model="queryParams.studentScale"
          placeholder="请输入学生数量"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['Class:class:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['Class:class:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['Class:class:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['Class:class:export']"
        >导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="classList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="班级ID" align="center" prop="classId" />
      <el-table-column label="班级名称" align="center" prop="className" />
      <el-table-column label="专业ID" align="center" prop="majorId" />
      <el-table-column label="专业名称" align="center" prop="majorName" />
      <el-table-column label="导员姓名" align="center" prop="instructorName" />
      <el-table-column label="班主任姓名" align="center" prop="headTeacherName" />
      <el-table-column label="学生数量" align="center" prop="studentScale" />
      <el-table-column label="备注" align="center" prop="remark" />
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['Class:class:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['Class:class:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    
    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改班级信息对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="班级名称" prop="className">
          <el-input v-model="form.className" placeholder="请输入班级名称" />
        </el-form-item>
        <el-form-item label="专业" prop="majorId">
          <el-select 
            v-model="form.majorId" 
            placeholder="请选择专业" 
            clearable 
            filterable
            style="width: 100%"
          >
            <el-option
              v-for="major in majors"
              :key="major.majorId"
              :label="major.majorName + ' (ID: ' + major.majorId + ')'"
              :value="major.majorId"
            />
          </el-select>
        </el-form-item>
        <el-form-item label="导员姓名" prop="instructorName">
          <el-input v-model="form.instructorName" placeholder="请输入导员姓名" />
        </el-form-item>
        <el-form-item label="班主任姓名" prop="headTeacherName">
          <el-input v-model="form.headTeacherName" placeholder="请输入班主任姓名" />
        </el-form-item>
        <el-form-item label="学生数量" prop="studentScale">
          <el-input v-model="form.studentScale" placeholder="请输入学生数量" />
        </el-form-item>
        <el-form-item label="备注" prop="remark">
          <el-input v-model="form.remark" type="textarea" placeholder="请输入内容" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listClass, getClass, delClass, addClass, updateClass } from "@/api/Class/class"
import { listMajor } from "@/api/Major/major"

export default {
  name: "Class",
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 班级信息表格数据
      classList: [],
      // 专业选项列表
      majors: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        className: null,
        majorId: null,
        instructorName: null,
        headTeacherName: null,
        studentScale: null,
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        className: [
          { required: true, message: "班级名称不能为空", trigger: "blur" }
        ],
        majorId: [
          { required: true, message: "专业不能为空", trigger: "change" }
        ]
      }
    }
  },
  created() {
    this.getList()
    this.getMajorList()
  },
  methods: {
    /** 查询班级信息列表 */
    getList() {
      this.loading = true
      listClass(this.queryParams).then(response => {
        this.classList = response.rows
        this.total = response.total
        // 绑定专业名称
        this.bindMajorNames()
        this.loading = false
      })
    },
    /** 获取专业列表 */
    getMajorList() {
      listMajor({ pageSize: 9999 }).then(response => {
        this.majors = response.rows || []
        // 获取专业列表后重新绑定专业名称
        if (this.classList.length > 0) {
          this.bindMajorNames()
        }
      }).catch(error => {
        console.error("获取专业列表失败:", error)
        this.$modal.msgError("获取专业列表失败")
      })
    },
    /** 绑定专业名称 */
    bindMajorNames() {
      if (!this.majors || this.majors.length === 0) return
      
      this.classList.forEach(item => {
        const major = this.majors.find(m => m.majorId === item.majorId)
        if (major) {
          this.$set(item, 'majorName', major.majorName)
        } else {
          this.$set(item, 'majorName', '未知专业')
        }
      })
    },
    // 取消按钮
    cancel() {
      this.open = false
      this.reset()
    },
    // 表单重置
    reset() {
      this.form = {
        classId: null,
        className: null,
        majorId: null,
        instructorName: null,
        headTeacherName: null,
        studentScale: null,
        createBy: null,
        createTime: null,
        updateBy: null,
        updateTime: null,
        remark: null
      }
      this.resetForm("form")
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1
      this.getList()
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm")
      this.handleQuery()
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.classId)
      this.single = selection.length!==1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset()
      this.open = true
      this.title = "添加班级信息"
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset()
      const classId = row.classId || this.ids
      getClass(classId).then(response => {
        this.form = response.data
        this.open = true
        this.title = "修改班级信息"
      })
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.classId != null) {
            updateClass(this.form).then(response => {
              this.$modal.msgSuccess("修改成功")
              this.open = false
              this.getList()
            })
          } else {
            addClass(this.form).then(response => {
              this.$modal.msgSuccess("新增成功")
              this.open = false
              this.getList()
            })
          }
        }
      })
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const classIds = row.classId || this.ids
      this.$modal.confirm('是否确认删除班级信息编号为"' + classIds + '"的数据项？').then(function() {
        return delClass(classIds)
      }).then(() => {
        this.getList()
        this.$modal.msgSuccess("删除成功")
      }).catch(() => {})
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('Class/class/export', {
        ...this.queryParams
      }, `class_${new Date().getTime()}.xlsx`)
    }
  },
  watch: {
    majors: {
      handler() {
        if (this.classList.length > 0) {
          this.bindMajorNames()
        }
      },
      deep: true
    }
  }
}
</script>